|From:||Marcus D. Leech|
|Subject:||Re: [Discuss-gnuradio] X-Ray flare observations with Gnu Radio software|
|Date:||Sat, 24 Sep 2011 20:24:02 -0400|
|User-agent:||Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:184.108.40.206) Gecko/20110906 Fedora/3.1.14-1.fc14 Thunderbird/3.1.14|
On 09/24/2011 08:14 PM, Pace VanDevender wrote:
That particular trace was at 24KHz--looking at the NAA station in Cutler, Maine.
Here is the data for NML, at 25.2Khz, located in LaMour, North Dakota:
You can see that the response is absorptive, rather than reflective, and less intense, along this very-much-longer path between
my receiver and the transmitter in North Dakota. In particular, the M7 at 15:20 UTC isn't even visible in this data, because the Sun
angle at the transmitter site was probably "all wrong" to get a strong response at that time of day.
I monitor several different frequencies, and submit data to the Stanford SID data center every day. With my 96KHz sound card, and loop
antenna, I can "see" from a few hundred Hz to around 45KHz or so.
-- Marcus Leech Principal Investigator Shirleys Bay Radio Astronomy Consortium http://www.sbrac.org
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